diff --git a/desmume/src/gtk/glx_3Demu.cpp b/desmume/src/gtk/glx_3Demu.cpp
index 8414d2f3d..02897c323 100644
--- a/desmume/src/gtk/glx_3Demu.cpp
+++ b/desmume/src/gtk/glx_3Demu.cpp
@@ -1,3 +1,23 @@
+/*  
+    Copyright (C) 2013 The Lemon Man
+
+    This file is part of DeSmuME
+
+    DeSmuME is free software; you can redistribute it and/or modify
+    it under the terms of the GNU General Public License as published by
+    the Free Software Foundation; either version 2 of the License, or
+    (at your option) any later version.
+
+    DeSmuME is distributed in the hope that it will be useful,
+    but WITHOUT ANY WARRANTY; without even the implied warranty of
+    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+    GNU General Public License for more details.
+
+    You should have received a copy of the GNU General Public License
+    along with DeSmuME; if not, write to the Free Software
+    Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
+*/
+
 #ifdef HAVE_GL_GLX
 #include <stdio.h>
 #include <X11/Xlib.h>
diff --git a/desmume/src/gtk/glx_3Demu.h b/desmume/src/gtk/glx_3Demu.h
index dcaa51c70..c0c4f40e2 100644
--- a/desmume/src/gtk/glx_3Demu.h
+++ b/desmume/src/gtk/glx_3Demu.h
@@ -1,3 +1,23 @@
+/*  
+    Copyright (C) 2013 The Lemon Man
+
+    This file is part of DeSmuME
+
+    DeSmuME is free software; you can redistribute it and/or modify
+    it under the terms of the GNU General Public License as published by
+    the Free Software Foundation; either version 2 of the License, or
+    (at your option) any later version.
+
+    DeSmuME is distributed in the hope that it will be useful,
+    but WITHOUT ANY WARRANTY; without even the implied warranty of
+    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+    GNU General Public License for more details.
+
+    You should have received a copy of the GNU General Public License
+    along with DeSmuME; if not, write to the Free Software
+    Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
+*/
+
 #ifdef HAVE_GL_GLX
 int init_glx_3Demu(void);
 #endif